Toyota Tacoma (2015-2018) Service Manual: System Description

Toyota Tacoma (2015-2018) Service Manual / Supplemental Restraint Systems / Occupant Classification System / System Description

SYSTEM DESCRIPTION

1. FRONT PASSENGER OCCUPANT CLASSIFICATION SYSTEM

(a) General Description

(1) The front passenger occupant detection ECU determines whether the front passenger seat is occupied by an adult or child (with child seat) or is unoccupied, based on the load that is applied to the front passenger seat and whether the seat belt is buckled. The system restricts the deployment of the front passenger airbag, front passenger side airbag, and the front passenger seat belt pretensioner in accordance with this judgment. The result is informed to the driver through the airbag ON/OFF indicator illumination.

(b) System Configuration

(1) This system consists of the occupant detection ECU, occupant classification sensors, airbag ON/OFF indicator, seat belt buckle switches, and airbag sensor assembly.

(1) The occupant classification sensors are installed on four brackets connecting the seat rail and the seat frame. The resistance values of these sensors, which vary in accordance with the load that acts on the brackets, are transmitted to the occupant detection ECU as signals. Upon receipt of the signals, the ECU determines the front passenger seat occupant conditions.

Initialization

INITIALIZATION 1. ZERO POINT CALIBRATION NOTICE: Make sure that the front passenger seat is not occupied before performing the operation. HINT: Perform the zero point calibration and sensitivit ...

System Diagram

SYSTEM DIAGRAM ...

Other materials:

Disposal
DISPOSAL CAUTION / NOTICE / HINT CAUTION: Before performing pre-disposal deployment of any SRS component, review and closely follow all applicable environmental and hazardous material regulations. Pre-disposal deployment may be considered hazardous material treatment. PROCEDURE 1. PRECAUTIO ...

Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT HINT: The procedure described below is for the LH side. Use the same procedure for both the LH and RH sides, unless otherwise specified. PROCEDURE 1. REMOVE REAR SEATBACK COVER (a) Remove the 2 screws. ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (a) for Double Cab (1) Disconnect the P18 power window regulator master switch assembly connector. (2) Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wi ...